Faselåste

Faselåste, also known as faselocking, is a technique used in the field of radio communications to synchronize the frequency of a local oscillator with that of an incoming signal. This process is crucial for demodulating amplitude-modulated (AM) signals, as it ensures that the local oscillator is tuned to the exact frequency of the incoming signal. The term "faselåste" is derived from the Swedish words "fase" (phase) and "låste" (locked), reflecting the technique's purpose of locking the phase of the local oscillator to that of the incoming signal.

The faselåste technique involves the use of a phase-locked loop (PLL), a control system that generates an output signal whose phase is related to the phase of an input signal. The PLL compares the phase of the local oscillator to that of the incoming signal and adjusts the frequency of the local oscillator accordingly. This adjustment continues until the phases of the two signals are synchronized, at which point the local oscillator is said to be "locked" to the incoming signal.

Faselåste is widely used in various applications, including radio receivers, television sets, and wireless communication devices. Its ability to synchronize the frequency of a local oscillator with that of an incoming signal makes it an essential tool in the demodulation of AM signals, enabling the accurate extraction of the original information from the modulated signal.